/* ====== Main Article Layout ====== */
.article-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: flex-start;
}

.article-container {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: clamp(1.5rem, 5vw, 3rem);
    box-shadow: var(--card-shadow);
}

/* ====== Breadcrumb Navigation ====== */
.breadcrumb-nav {
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.breadcrumb-nav a {
    color: var(--accent-color);
    text-decoration: underline;
}
.breadcrumb-nav a:hover {
    text-decoration: underline;
}
.breadcrumb-nav span {
    margin: 0 0.5rem;
}

/* ====== Article Header ====== */
.article-header .category-link {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: .3rem .8rem;
    border-radius: 20px;
    font-size: .9rem;
    font-weight: 500;
    text-decoration: none;
    margin-bottom: 1rem;
}

.article-header h1 {
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    line-height: 1.2;
}

.article-meta {
    font-size: .9rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.article-meta a {
    color: var(--text-primary);
    font-weight: 500;
    text-decoration: none;
}

.article-meta a:hover {
    color: var(--accent-color);
}

/* ====== Article Body Typography & Content ====== */
.article-body {
    line-height: 1.8;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.article-body h2 {
    font-size: 1.8rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
    scroll-margin-top: 80px; /* Offset for sticky header */
}

.article-body h3 {
    font-size: 1.4rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    scroll-margin-top: 80px;
}

.article-body p { margin-bottom: 1.25rem; }
.article-body ul, .article-body ol { padding-left: 2rem; margin-bottom: 1.25rem; }
.article-body li { margin-bottom: 0.75rem; }
.article-body a { color: var(--accent-color); text-decoration: none; }
.article-body a:hover { text-decoration: underline; }
.article-body strong { font-weight: 600; color: var(--accent-color); }
.article-body code {
    background-color: var(--input-bg);
    padding: .2em .4em;
    margin: 0;
    font-size: 85%;
    border-radius: 6px;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
}

.article-body pre {
    position: relative; /* For positioning the copy button */
    background-color: var(--input-bg);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow-x: auto;
}
.article-body pre code {
    background: none;
    padding: 0;
    font-size: 100%;
}

.copy-code-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background-color: var(--button-hover-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.25rem 0.6rem;
    font-size: 0.8rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease, background-color 0.2s ease, color 0.2s ease;
    z-index: 1;
}

.article-body pre:hover .copy-code-btn {
    opacity: 1;
}

.copy-code-btn:hover {
    background-color: var(--accent-color-transparent);
}

.copy-code-btn.copied {
    background-color: var(--green);
    color: white;
    border-color: var(--green);
}

html[data-theme=dark] .copy-code-btn.copied {
    background-color: #66bb6a;
    color: #000;
    border-color: #66bb6a;
}

.info-box {
    background-color: var(--input-bg);
    border-left: 4px solid var(--accent-color);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
}
.info-box p:last-child { margin-bottom: 0; }

/* ====== Table of Contents (TOC) ====== */
.toc-sidebar {
    position: sticky;
    top: 80px; /* header height + margin */
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

.toc-sidebar h3, .toc-mobile-container summary {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 600;
}

.toc-mobile-container {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}
.toc-mobile-container summary {
    padding: 1rem;
    cursor: pointer;
    list-style: none; /* Hide default arrow */
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.toc-mobile-container summary::-webkit-details-marker {
    display: none;
}
.toc-mobile-container summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent-color);
    transition: transform 0.2s ease;
}
.toc-mobile-container[open] summary::after {
    transform: rotate(45deg);
}
.toc-mobile-container .toc-list-wrapper {
    padding: 0 1rem 1rem 1rem;
}


#toc-list-desktop, #toc-list-mobile { list-style: none; padding: 0; margin: 0; }

#toc-list-desktop li a, #toc-list-mobile li a {
    text-decoration: none;
    color: var(--text-secondary);
    display: block;
    padding: 0.5rem 0;
    border-left: 3px solid transparent;
    padding-left: 1rem;
    transition: all 0.2s ease;
    font-size: 0.95rem;
}

#toc-list-desktop li a:hover, #toc-list-mobile li a:hover {
    color: var(--accent-color);
    background-color: var(--input-bg);
}

#toc-list-desktop li a.active, #toc-list-mobile li a.active {
    color: var(--accent-color);
    font-weight: 600;
    border-left-color: var(--accent-color);
    background-color: color-mix(in srgb, var(--accent-color) 8%, transparent);
}

#toc-list-desktop li.toc-level-2 a, #toc-list-mobile li.toc-level-2 a {
    padding-left: 2rem; /* Indent H3 links */
}

/* ====== Custom SVG & Images ====== */
.custom-svg-diagram {
    width: 100%;
    height: auto; /* Ensures aspect ratio is maintained */
    max-width: 600px;
    margin: 2rem auto;
    display: block;
    background-color: var(--input-bg);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    box-sizing: border-box; /* Prevents padding from adding to width */
}
.custom-svg-diagram text { fill: var(--text-primary); }
.custom-svg-diagram .label-box { fill: var(--card-bg); }

/* ====== Related Guides Section ====== */
.related-guides-section {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}
.related-guides-section h2 {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 2rem;
}
.related-guides-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ====== Responsive Layout for TOC ====== */
.toc-sidebar { display: none; } /* Hide sidebar by default */
.toc-mobile-container { display: block; } /* Show mobile accordion by default */

@media (min-width: 1024px) {
    .article-layout {
        grid-template-columns: 280px 1fr;
        gap: 2.5rem;
    }
    .toc-sidebar-container {
        grid-column: 1 / 2;
        order: -1;
    }
    .article-container {
        grid-column: 2 / 3;
    }
    .toc-sidebar { display: block; } /* Show sidebar on desktop */
    .toc-mobile-container { display: none; } /* Hide mobile accordion on desktop */
}.toc-sidebar-container {
    align-self: start;
    position: sticky;
    top: 80px;
    height: fit-content;
}
.toc-sidebar {
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

.post-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    justify-content: center;
    justify-items: center;
}